تقرير
Physics-informed tracking of qubit fluctuations
| العنوان: | Physics-informed tracking of qubit fluctuations |
|---|---|
| المؤلفون: | Berritta, Fabrizio, Krzywda, Jan A., Benestad, Jacob, van der Heijden, Joost, Fedele, Federico, Fallahi, Saeed, Gardner, Geoffrey C., Manfra, Michael J., van Nieuwenburg, Evert, Danon, Jeroen, Chatterjee, Anasua, Kuemmeth, Ferdinand |
| المصدر: | Phys. Rev. Applied 22, 014033 (2024) |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Quantum Physics |
| الوصف: | Environmental fluctuations degrade the performance of solid-state qubits but can in principle be mitigated by real-time Hamiltonian estimation down to time scales set by the estimation efficiency. We implement a physics-informed and an adaptive Bayesian estimation strategy and apply them in real time to a semiconductor spin qubit. The physics-informed strategy propagates a probability distribution inside the quantum controller according to the Fokker-Planck equation, appropriate for describing the effects of nuclear spin diffusion in gallium-arsenide. Evaluating and narrowing the anticipated distribution by a predetermined qubit probe sequence enables improved dynamical tracking of the uncontrolled magnetic field gradient within the singlet-triplet qubit. The adaptive strategy replaces the probe sequence by a small number of qubit probe cycles, with each probe time conditioned on the previous measurement outcomes, thereby further increasing the estimation efficiency. The combined real-time estimation strategy efficiently tracks low-frequency nuclear spin fluctuations in solid-state qubits, and can be applied to other qubit platforms by tailoring the appropriate update equation to capture their distinct noise sources. Comment: 21 pages, 10 figures, including 11-page 6-figure Supplemental Material |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.22.014033 |
| URL الوصول: | http://arxiv.org/abs/2404.09212 |
| رقم الأكسشن: | edsarx.2404.09212 |
| قاعدة البيانات: | arXiv |
كن أول من يترك تعليقا!